Fix line opacity control before sort.
Fix line opacity control before sort.

arokem/AFQ-Browser,richford/AFQ-Browser,richford/AFQ-Browser,arokem/AFQ-Browser,yeatmanlab/AFQ-Browser,arokem/AFQ-Browser,yeatmanlab/AFQ-viz,yeatmanlab/AFQ-Browser,yeatmanlab/AFQ-viz,yeatmanlab/AFQ-Browser,richford/AFQ-Browser,richford/AFQ-viz,richford/AFQ-viz